You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
Erik Zscheile dd1f51c151 use lasso::Spur to represent identifiers 11 months ago
crates/zaias use lasso::Spur to represent identifiers 11 months ago
docs prepare parsing 11 months ago
.gitignore initial commit 11 months ago
Cargo.lock improve parser and tys 11 months ago
Cargo.toml initial commit 11 months ago
README.md initial commit 11 months ago

README.md

zaias

A concept for an (maybe quite esoteric) programming language which tries to blur the line between "sum types" and "abstract base types" / "type classes".

concrete types

Objects in the language can only have one of the following types:

  • Primitive types ("Primitive" is virtual, e.g. not available from the lang):
    • ! (empty type), can't exist at runtime, represents diverging execution
    • Unit, which only has a single value
    • Bool, which only has two possible values: true, false, and can be efficiently represented by one bit
  • Resource, the type of resource handles, which refer to objects which don't allow intuitive manipulation via functional programming, because they are dependent on interactions with the OS or I/O
  • Composed types ("Composed" is virtual):
    • Value, the type of all values in the language, (which can't contain any references to resources, thus without any side effects)
    • Mixed (virtual), the type of all composed objects, which contain both Resources and Values
  • *, the type of all objects in the language

Any type is (inside of the language) handled equivalent to a named list of all values which have this type. Traits ("interfaces") are also handled similarily, that is, if a set of values if expected, and a trait name is given, it is handled like the name of list of all values which implement that trait.

type hierarchy

# notation: subtypes ,* : supertype
! : Primitive, Mixed
Unit, Bool : Primitive, Value
Resource, Value : if T is base { Any } else { Composed }
Primitive, Composed : Any